23 research outputs found
Theorizing the Relationship Between Identity and Diversity Engagement: Openness Through Identity Mismatch
Psychological research suggests that engagement with diversity-relevant materials can have a positive impact on interracial relations. However, prior research also suggests that there may be individual differences in how effective exposure to critical diversity narratives would be in facilitating positive intergroup attitudes. The primary aim of this paper is to provide some empirically based theorizing about patterns of group identification and their relationship to effective diversity exposure. In this chapter, we discuss two examples of research that explore for whom engagement with critical diversity activities may facilitate increased perceptions of social inequality. We begin by conceptualizing four race-based identity profiles derived from orthogonal considerations of attachment and glorification. We discuss support for findings that suggest that scoring high on one dimension but not the other (mixed or mismatched identity profiles) constitutes the identity profiles most likely to facilitate openness to critical, potentially identity-threatening, diversity content.Ye
Current status of turbulent dynamo theory: From large-scale to small-scale dynamos
Several recent advances in turbulent dynamo theory are reviewed. High
resolution simulations of small-scale and large-scale dynamo action in periodic
domains are compared with each other and contrasted with similar results at low
magnetic Prandtl numbers. It is argued that all the different cases show
similarities at intermediate length scales. On the other hand, in the presence
of helicity of the turbulence, power develops on large scales, which is not
present in non-helical small-scale turbulent dynamos. At small length scales,
differences occur in connection with the dissipation cutoff scales associated
with the respective value of the magnetic Prandtl number. These differences are
found to be independent of whether or not there is large-scale dynamo action.
However, large-scale dynamos in homogeneous systems are shown to suffer from
resistive slow-down even at intermediate length scales. The results from
simulations are connected to mean field theory and its applications. Recent
work on helicity fluxes to alleviate large-scale dynamo quenching, shear
dynamos, nonlocal effects and magnetic structures from strong density
stratification are highlighted. Several insights which arise from analytic
considerations of small-scale dynamos are discussed.Comment: 36 pages, 11 figures, Spa. Sci. Rev., submitted to the special issue
"Magnetism in the Universe" (ed. A. Balogh
Magnetic Field Generation in Stars
Enormous progress has been made on observing stellar magnetism in stars from
the main sequence through to compact objects. Recent data have thrown into
sharper relief the vexed question of the origin of stellar magnetic fields,
which remains one of the main unanswered questions in astrophysics. In this
chapter we review recent work in this area of research. In particular, we look
at the fossil field hypothesis which links magnetism in compact stars to
magnetism in main sequence and pre-main sequence stars and we consider why its
feasibility has now been questioned particularly in the context of highly
magnetic white dwarfs. We also review the fossil versus dynamo debate in the
context of neutron stars and the roles played by key physical processes such as
buoyancy, helicity, and superfluid turbulence,in the generation and stability
of neutron star fields.
Independent information on the internal magnetic field of neutron stars will
come from future gravitational wave detections. Thus we maybe at the dawn of a
new era of exciting discoveries in compact star magnetism driven by the opening
of a new, non-electromagnetic observational window.
We also review recent advances in the theory and computation of
magnetohydrodynamic turbulence as it applies to stellar magnetism and dynamo
theory. These advances offer insight into the action of stellar dynamos as well
as processes whichcontrol the diffusive magnetic flux transport in stars.Comment: 41 pages, 7 figures. Invited review chapter on on magnetic field
generation in stars to appear in Space Science Reviews, Springe
Magnetic Field Amplification in Galaxy Clusters and its Simulation
We review the present theoretical and numerical understanding of magnetic
field amplification in cosmic large-scale structure, on length scales of galaxy
clusters and beyond. Structure formation drives compression and turbulence,
which amplify tiny magnetic seed fields to the microGauss values that are
observed in the intracluster medium. This process is intimately connected to
the properties of turbulence and the microphysics of the intra-cluster medium.
Additional roles are played by merger induced shocks that sweep through the
intra-cluster medium and motions induced by sloshing cool cores. The accurate
simulation of magnetic field amplification in clusters still poses a serious
challenge for simulations of cosmological structure formation. We review the
current literature on cosmological simulations that include magnetic fields and
outline theoretical as well as numerical challenges.Comment: 60 pages, 19 Figure
Digestibilidade intestinal in vitro da proteĂna de coprodutos da indĂșstria do biodiesel
Validation of âCare Of the Dying Evaluationâ (CODETM) within an international study exploring bereaved relativesâ perceptions about quality of care in the last days of life
Context:
Assessing quality of care provided during the dying phase using validated tools aids quality assurance and recognises unmet need.
Objective:
To assess construct validity and internal consistency of âCare Of the Dying Evaluationâ (CODETM) within an international context.
Methods:
Post-bereavement survey (August 2017-September 2018) using CODETM. Respondents were next-of-kin to adult patients (â„ 18 years old) with cancer who had an âexpectedâ death within 22 study site hospitals in 7 countries: Argentina, Brazil, Germany, Norway, Poland, United Kingdom, Uruguay. Exploratory and Confirmatory Factor Analysis (EFA and CFA) were conducted, and internal reliability was assessed using Cronbach alpha (α). Known group validity was assessed by ability to discriminate quality of care based in place (Palliative Care Units (PCUs)) and country (Poland, where most deaths were in PCUs) of care. Differences were quantified using effect sizes (ES).
Results:
914 CODETM questionnaires completed (54% response rate). 527 (58%) male deceased patients; 610 (67%) next-of-kin female who were most commonly the âspouse/partnerâ (411, 45%). EFA identified 4 factors: âOverall careâ, âCommunication and supportâ, âTrust, respect and dignityâ, and âSymptom managementâ with good reliability scores (αâ= 0.628 â 0.862). CFA confirmed the 4-factor model; these were highly correlated and a bifactor model showed acceptable fit. The ES for quality of care in PCU's was 0.727; ES for Poland was 0.657, supporting the sensitivity of CODETM to detect differences.
Conclusion:
Within an international context, good evidence supports the validity and reliability of CODETM for assessing the quality of care provided in the last days of life